214162221 has 32 divisors (see below), whose sum is σ = 358944768. Its totient is φ = 110554560.

The previous prime is 214162181. The next prime is 214162237. The reversal of 214162221 is 122261412.

It is not a de Polignac number, because 214162221 - 2⁹ = 214161709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214162261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4486 + ... + 21176.

It is an arithmetic number, because the mean of its divisors is an integer number (11217024).

Almost surely, 2^214162221 is an apocalyptic number.

214162221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

214162221 is a deficient number, since it is larger than the sum of its proper divisors (144782547).

214162221 is a wasteful number, since it uses less digits than its factorization.

214162221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16761.

The product of its digits is 384, while the sum is 21.

The square root of 214162221 is about 14634.2823875993. The cubic root of 214162221 is about 598.2935038306.

The spelling of 214162221 in words is "two hundred fourteen million, one hundred sixty-two thousand, two hundred twenty-one".